linux-kernel - Re: INFO: task rcu_gp:3 blocked for more than 122 seconds.

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Message-ID: <YzcZHOMOxqCBvasV@zn.tnic>
Date:   Fri, 30 Sep 2022 18:28:12 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     "Paul E. McKenney" <paulmck@...nel.org>
Cc:     Peter Zijlstra <peterz@...radead.org>, x86-ml <x86@...nel.org>,
        lkml <linux-kernel@...r.kernel.org>
Subject: Re: INFO: task rcu_gp:3 blocked for more than 122 seconds.

On Fri, Sep 30, 2022 at 09:11:29AM -0700, Paul E. McKenney wrote:
> That can be annoying!  I well recall one bisection session where each step
> took several hours, and where each step required manual intervention,
> and where the bug was urgent.  I got the bisection overnight, but was
> pretty useless then next day.  ;-)

Yikes, I hate those moments.

> It is possible that Peter would want proof of this.  ;-)

Yeah, figured it out while we were talking about it on IRC:

https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git/commit/?h=sched/core&id=fdf756f7127185eeffe00e918e66dfee797f3625

Ok, one down, gazillion more to go.

:-)

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette